JP2016090073A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which can have its cooling performance improved.SOLUTION: A refrigerator comprises: a cold room and a freezing room; a vegetable room which is arranged between the cold room and freezing room while biased to one side in a right-left direction and held at a refrigeration temperature; a refrigeration section part adjacent lateral of the vegetable room and held at a freezing temperature; and a cold air passage where a cooler 11 is arranged which is formed in a plurality of stages by having a refrigerant pipe, having a fin formation part 40 where a plurality of fins 40a are provided successively, extended zigzag, cold air being discharged to the cold room, vegetable room, freezing section part, and refrigerant room through the cold air passage. The refrigerator further has: a cooler room in which the cooler 11 is installed and which is provided behind the freezing chamber from below the freezing section part to below th vegetable room; and an upper passage extending upward from the cooler room via behind the freezing section part not via behind the vegetable room, a fin formation part 40 of the top stage of the cooler 11 being formed to a smaller right-left directional direction than a fin formation part 40 of the bottom stage, and arranged while biased to an upper passage side.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a refrigerator having a cold air passage.

  A conventional refrigerator is disclosed in Patent Document 1. The refrigerator is provided with a refrigerator compartment (first refrigerator compartment) for storing stored items in the upper part of the heat insulation box, and a vegetable compartment (second refrigerator compartment) for storing stored items under the refrigerator compartment. The Below the vegetable compartment, a freezer compartment for storing stored items in a frozen state is arranged vertically.

  A machine room is provided on the back side of the lowermost freezer compartment, and a compressor for operating the refrigerating cycle is arranged in the machine room.

  At the rear of the freezer compartment, vegetable compartment, and refrigeration compartment, a cool air passage is provided through which cool air flows through a cooler, a blower fan, and a damper. A discharge port and a return port facing the freezer compartment, a discharge port facing the refrigerator compartment, and a return port facing the vegetable chamber are opened in the cold air passage. In the refrigerator compartment, a communication path for guiding cold air to the vegetable compartment is led out.

  In the refrigerator having the above configuration, cold air generated by heat exchange between the air flowing through the cold air passage and the cooler by driving the compressor and the blower fan is discharged from the discharge port to the freezer compartment. The cold air discharged from the discharge port flows through the freezer compartment and returns to the cooler through the return port.

  When the damper is opened, the cold air is discharged from the discharge port of the refrigerator compartment and flows into the vegetable compartment through the communication path. The cold air circulated through the vegetable compartment returns to the cooler through the return port. Thereby, a freezer compartment, a refrigerator compartment, and a vegetable compartment are cooled.

JP-A-9-113108

  However, according to the conventional refrigerator, the cold air generated by the cooler flows into the refrigerating room through the cold air passage disposed on the back surface of the vegetable room. For this reason, when cold air distribute | circulates the back of a vegetable compartment, there exists a possibility that the temperature of cold air may rise. Therefore, there has been a problem that the cooling capacity of the refrigerator is lowered.

  An object of this invention is to provide the refrigerator which can improve cooling capacity.

  In order to achieve the above object, a refrigerator of the present invention includes a first refrigeration room maintained at a refrigeration temperature, a freezing room disposed below the first refrigeration room and maintained at a refrigeration temperature, and a first refrigeration room. A second refrigeration chamber that is biased in one of the left and right directions and is maintained at a refrigeration temperature, and adjacent to the side of the second refrigeration chamber, the first refrigeration chamber and the freezer compartment Cooling air in which a refrigeration compartment part that is arranged between the two and a refrigeration compartment part that is maintained at a refrigeration temperature and a cooler that is formed in a plurality of stages by meandering refrigerant pipes having a fin forming part in which a plurality of fins are arranged side by side A refrigerator that discharges cold air to the first refrigerator compartment, the second refrigerator compartment, the freezing compartment, and the freezer compartment via the cold air passage, wherein the cool air passage is provided with the cooler and the freezer Provided behind the freezer compartment from the lower part of the compartment to the lower part of the second refrigerator compartment. And a fin passage in the uppermost stage of the cooler, and an upper passage extending upward from the cooler chamber through the rear of the freezer compartment, avoiding the rear of the second refrigerator compartment Is formed in a width in the left-right direction that is smaller than the fin forming portion at the lowermost stage, and is biased toward the upper passage side.

  In the refrigerator having the above-described configuration, the uppermost refrigerant pipe of the cooler is formed to have a width in the left-right direction smaller than the lowermost refrigerant pipe.

  In the refrigerator configured as described above, the return port for returning the cool air to the cooler chamber is provided in a lower portion on the opposite side of the upper passage of the cooler chamber.

  In the refrigerator having the above-described configuration, the present invention further includes an accumulator that accumulates the refrigerant that has flowed out of the cooler, and the accumulator is disposed on a side opposite to the upper passage with respect to the cooler. And

  According to the present invention, in the refrigerator configured as described above, a defrosting heater for defrosting disposed below the cooler, a first thermistor that detects the temperature of the upper part of the cooler, and the temperature of the accumulator are detected. The defrosting operation is stopped when the defrosting operation is started and the first and second thermistors reach a predetermined temperature.

  Further, the present invention is characterized in that a shielding plate that shields the cooler and the accumulator is provided.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, one side wall of the upper passage and the upper wall of the cooler chamber are connected by an inclined surface.

  According to the present invention, the cooler chamber in which the cooler is disposed is provided behind the freezer compartment from the lower portion of the freezer compartment to the lower portion of the second refrigerator compartment, and the upper passage extending upward from the cooler chamber has the second refrigerator. Avoid the back of the chamber and pass the back of the freezing compartment. For this reason, the temperature rise of the cold air flowing through the upper passage is suppressed, and the cooling capacity of the refrigerator can be improved.

  In addition, the uppermost fin forming portion of the cooler formed in a plurality of stages is formed with a width in the left-right direction smaller than that of the lowermost fin forming part, and is arranged biased toward the upper passage side. Thereby, since the cool air flowing from the lower side to the upper side in the cooler chamber is guided to the upper passage that is biased to one side in the left-right direction, a reduction in the heat exchange amount can be suppressed even if the width of the uppermost fin forming portion is narrowed. Therefore, fins can be reduced and the cost of the refrigerator can be reduced.

The front view which shows the refrigerator of 1st Embodiment of this invention. The front view of the main-body part of the refrigerator of 1st Embodiment of this invention. AA sectional view of FIG. BB sectional view of FIG. The perspective view which shows the lower part of the freezing cold air | gas channel | path of the refrigerator of 1st Embodiment of this invention, and a cooler chamber The front view which shows the cooler of the refrigerator of 1st Embodiment of this invention. The perspective view which shows the vegetable compartment of the refrigerator of 1st Embodiment of this invention. The front view of the main-body part of the refrigerator of 2nd Embodiment of this invention. The front view of the main-body part of the refrigerator of 3rd Embodiment of this invention. CC sectional view of FIG.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of the refrigerator 1 of the first embodiment. In the refrigerator 1, doors are arranged on the front surfaces of a plurality of storage rooms provided in the main body 2 (see FIG. 2). A refrigerator compartment (first refrigerator compartment) 4 for storing stored items in a refrigerator is arranged at the top of the refrigerator 1, and the front face of the refrigerator compartment 4 is opened and closed by a double door 4L and a door 4R. A freezer compartment 6 for storing stored items in a frozen state is disposed at the bottom of the refrigerator 1, and the front surface of the freezer compartment 6 is opened and closed by a drawer-type door 6a integrated with a storage case 6d (see FIG. 2).

  A vegetable room (second refrigerating room) 5 is arranged between the refrigerating room 4 and the freezing room 6 so as to be biased to the right. The vegetable compartment 5 is maintained at a refrigeration temperature to store stored items such as vegetables in a refrigerated state, and is opened and closed by a drawer-type door 5a integrated with a storage case 50 (see FIG. 2).

  In addition, a freezing compartment 21 (see FIG. 2) that is maintained at the freezing temperature is provided between the refrigerator compartment 4 and the freezer compartment 6 adjacent to the left side of the vegetable compartment 5. The freezing compartment 21 has an ice making room 25 arranged at the upper part and a freezing room 26 arranged at the lower part. The front surface of the ice making chamber 25 is opened and closed by a drawer type door 25a integrated with an ice storage case 25b (see FIG. 2). The front surface of the freezer compartment 26 is opened and closed by a drawer-type door 26a integrated with a storage case 26b (see FIG. 2).

  The door 5a is formed with the same width as the door 4R of the refrigerator compartment 4, and the doors 25a and 26a are formed with the same width as the door 4L of the refrigerator compartment 4. Thereby, the beauty | look of the refrigerator 1 can be improved.

  FIG. 2 shows a front view of the main body 2. 3 shows a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 shows a cross-sectional view taken along the line BB in FIG. The main body 2 forms each storage chamber by a heat insulating box 3 filled with a heat insulating material 13 between the inner box and the outer box. The refrigerating room 4 and the vegetable room 5 and the refrigerating room 4 and the ice making room 25 are partitioned by a partition 18 arranged horizontally. The vegetable compartment 5 and the freezer compartment 6 are partitioned by a partitioning portion 19 arranged horizontally. The vegetable compartment 5 and the freezing compartment 21 are partitioned by a partition 20 arranged vertically. In addition, when the partition part is filled with the heat insulating material 13, when the temperature difference between the respective storage chambers is large, it is possible to prevent the adverse effect of the stored item due to the supercooling of the stored item in the vicinity of the partition unit. For this reason, when the temperature difference between each store room is large, it is preferable to fill the heat insulating material 13 in the partition part which partitions a store room.

  At the front end between the freezer compartment 26 and the freezer compartment 6, a partition portion 36 that is horizontally disposed at the same height as the partition portion 19 is provided. A partition portion 35 disposed horizontally is provided at a front end portion between the ice making chamber 25 and the freezing chamber 26. The ice making room 25, the freezing room 26 and the freezing room 6 communicate with each other behind the partition portions 35 and 36.

  In the refrigerator compartment 4, a plurality of shelves 4b, 4c, 4d, and 4e are provided. Below the shelf 4e at the lower end, there is formed a chilled chamber 70 which is formed of an isolation chamber and is biased to the right. A storage case 70 a is provided in the chilled chamber 70. An accessory chamber 73 with a storage case 71 is adjacent to the left of the chilled chamber 70, and a water storage tank 72 for storing ice-making water is disposed on the left of the accessory chamber 73.

  A storage case 51 is placed on the storage case 50 in the vegetable compartment 5. A storage case 6c is placed on the storage case 6d of the freezer compartment 6, and a storage case 6b is placed on the storage case 6c.

  A machine room 30 is provided in the lower part of the main body 2 behind the freezer compartment 6. A compressor 31 that operates the refrigeration cycle is disposed in the machine room 30.

  A cool air passage 7 through which cool air flows is provided at the rear part of the main body 2. The cold air passage 7 has a cooler chamber 12, an upper passage 9, a lower passage 29, and a return passage 34. The cooler chamber 12 is arranged behind the freezer compartment 26 from below the freezer compartment 26 to below the vegetable compartment 5, and the cooler 11 is installed. The cooler 11 is above the machine room 30, and a return port 9 c through which cool air returns from the freezer compartment 6 is provided at the lower end of the cooler room 12. The return port 9 c extends in the left-right direction, and the right end portion is provided on the opposite side of the upper passage 9.

  The upper passage 9 extends upward from the cooler chamber 12, and the lower passage 29 is disposed on the front surface of the cooler chamber 12 via a partition plate 27. The return passage 34 is led out downward from the vegetable compartment 5 along the side wall of the freezer compartment 6 opposite to the upper passage 9 and is connected via a return port 12 c provided at the lower end of the side wall 12 d of the cooler compartment 12. . At this time, the return port 12 c is arranged below the cooler 11. The partition 18 that forms the bottom wall of the refrigerator compartment 4 is provided with a communication port 4f that allows the refrigerator compartment 4 and the vegetable compartment 5 to communicate with each other.

  A blower fan 10, a damper 23, and a blower fan 24 are disposed in the upper passage 9 from below. The blower fan 10 is disposed at a position overlapping the partition portion 36 in front projection. The lower passage 29 diverges from the upper passage 9 on the exhaust side of the blower fan 10 and extends downward. The damper 23 is opened when the refrigerator compartment 4 and the vegetable compartment 5 are cooled, and guides cool air to the refrigerator passage 8 formed above the damper 23 in the upper passage 9. The blower fan 24 is driven when the damper 23 is opened. The front surfaces of the upper passage 9 and the lower passage 29 below the damper 23 are covered with a panel 7a. Further, the front surface of the refrigeration passage 8 above the damper 23 of the upper passage 9 is covered with a panel 7b.

  The refrigerating passage 8 is arranged along the back surface and the ceiling surface of the refrigerating chamber 4, and a plurality of discharge ports 8 a to 8 f facing the refrigerating chamber 4 are opened. The discharge port 8 a is provided in the front part of the refrigeration passage 8 on the ceiling surface of the refrigeration chamber 4. The discharge ports 8b to 8d are provided between the shelves 4b to 4e. The lower discharge ports 8e and 8f face the chilled chamber 70.

  Below the damper 23 in the upper passage 9, the vegetable compartment 5 is avoided and the ice making chamber 25 and the freezing chamber 26 are passed behind, and a discharge port 9 a facing the ice making chamber 25 and a discharge port 9 b facing the freezing chamber 26 are opened. Discharge ports 29 a to 29 d facing the freezer compartment 6 are opened in the lower passage 29. The discharge ports 29 a to 29 c are arranged vertically in the vertical direction below the freezer compartment 26. The discharge port 29 d is arranged vertically below the vegetable compartment 5.

  FIG. 5 shows a perspective view of the lower part of the upper passage 9 of the cool air passage 7 and the cooler chamber 12. FIG. 6 shows a front view of the cooler 11. A defrost heater 46, a cooler 11, and a thermistor (first thermistor) 45a are arranged in the cooler chamber 12 from below, and an accumulator 42, a shielding plate 44, and a thermistor (second thermistor) are disposed on the right side of the cooler 11. 45b is arranged.

  The defrost heater 46 has a right end extending below the accumulator 42 and a left end extending below the left end of the cooler 11. The defrost heater 46 is formed by a glass tube heater, and defrosts the cooler 11 and the accumulator 42. The cooler 11 is disposed in a low temperature part of the refrigeration cycle and has a refrigerant pipe 41 through which the refrigerant flows. The refrigerant pipe 41 meanders in the up-down direction and the front-rear direction and is formed in a plurality of stages (in this embodiment, seven stages), and the lower part is formed extending rightward in the drawing from the upper part. For this reason, the width L1 in the left-right direction of the uppermost refrigerant pipe 41 of the cooler 11 is formed smaller than the width L2 in the left-right direction of the lowermost stage.

  A fin forming portion 40 in which thin plate-like fins 40a are arranged side by side on the horizontal portion of the refrigerant pipe 41 at each stage is provided. The horizontal width L3 of the uppermost fin forming portion 40 of the cooler 11 is formed to be smaller than the lowermost horizontal width L4, and the uppermost fin forming portion 40 is arranged so as to be biased toward the upper passage 9 side. . In the present embodiment, the width L3 in the left-right direction of the fin forming portion 40 is formed to be ½ or less of the width L4. Further, the pitch width of the fins 40a of the lowermost fin forming portion 40 is formed larger than the pitch width of the other stages.

  The thermistor 45a detects the temperature of the upper part of the cooler 11. The accumulator 42 is provided in the lower part opposite to the upper passage 9 and is connected to the lowermost refrigerant pipe 41. The accumulator 42 accumulates the refrigerant in the refrigerant pipe 41 and prevents the refrigerant that has not been gasified by the cooler 11 from being sucked into the compressor 31 in a liquid state.

  A plate-like end plate 43 extending over a plurality of stages is provided at the left end of the cooler 11, and a plate-shaped shielding plate 44 extending over a plurality of stages is provided at the right end.

  The shielding plate 44 is bent to cover the left and upper sides of the accumulator 42 and shield the cooler 11. Thereby, the shielding chamber 44a partitioned by the shielding plate 44 in the cooler chamber 12 is formed. The thermistor 45b (second thermistor) is provided on the left side of the upper portion of the accumulator 42 outside the shielding chamber 44a, and detects the temperature of the accumulator 42. The thermistor 45b does not directly detect the temperature of the defrost heater 46, but may be disposed at a position where the temperature of the accumulator 42 is detected. Therefore, the thermistor 45b is disposed inside the shielding chamber 44a (for example, at the top of the accumulator 42). It may be.

  The side wall 9d on the right side of the upper passage 9 and the upper wall 12b of the cooler chamber 12 are connected by an inclined surface 12a. A straight line D connecting the blower fan 10 and the return port 12c is substantially parallel to the inclined surface 12a. Thus, when the cool air returns into the cooler chamber 12 through the return port 12c, the air flow at the right end of the cooler chamber 12 can be guided to the upper passage 9 without stopping. Therefore, the pressure loss of the cool air passage 7 can be reduced.

  FIG. 7 shows a schematic perspective view of the vegetable compartment 5. Between the rear part of the partition part 19 that forms the bottom wall of the vegetable compartment 5 and the rear part of the partition part 20 that forms the left side wall, an avoiding part 5d that avoids interference with the inclined surface 12a is provided. The avoidance part 5d is integrally formed by the partition part 19 and the partition part 20, and the avoidance part 5d is filled with the heat insulating material 13. In addition, chamfering (not shown) which avoids interference with the avoidance part 5d is formed between the side wall and bottom wall of the storage case 50 (see FIG. 4) in the vegetable compartment 5.

  In the refrigerator 1 having the above configuration, the air flowing through the cooler chamber 12 and the cooler 11 exchange heat by driving the compressor 31 and the blower fan 10 to generate cold air. The cold air generated by the cooler 11 flows through the upper passage 9, is discharged from the discharge port 9 a to the ice making chamber 25, and is discharged from the discharge port 9 b to the freezing chamber 26. Further, the cold air flows through the lower passage 29 and is discharged from the discharge ports 29a, 29b, 29c to the freezer compartment 6. The cold air discharged into the ice making room 25, the freezing room 26, and the freezing room 6 flows through each storage room and returns to the cooler 11 through the return port 9c. At this time, the upper passage 9 avoids the rear of the vegetable compartment 5 and passes through the rear of the freezing compartment 21, so that the temperature rise of the cold air due to the temperature of the vegetable compartment 5 is suppressed. Thereby, the inside of the ice making room 25, the freezing room 26, and the freezing room 6 is cooled.

  When the damper 23 is opened, cold air flows into the refrigeration passage 8 of the upper passage 9 and is discharged from the discharge ports 8a, 8b, 8c, 8d, 8e, 8f to the refrigeration chamber 4. The discharged cool air flows to the front of the refrigerator compartment 4 and then flows downward, and flows out from the communication port 4f. Thereby, the inside of the refrigerator compartment 4 is cooled.

  Thereafter, the cold air is discharged into the vegetable chamber 5 through the communication port 4 f, circulates from the front to the rear of the vegetable chamber 5, and returns to the cooler chamber 12 from the return port 12 c through the return passage 34. At this time, the width L3 of the uppermost fin forming section 40 of the cooler 11 is smaller than the width L4 of the lowermost fin forming section 40, and the uppermost stage is arranged biased toward the upper passage 9 side. Since the cool air flowing from the lower part to the upper part in the cooler chamber 12 is guided to the upper passage 9 that is biased to the left, the heat exchange amount is reduced even if the width L3 of the fin forming portion 40 at the uppermost stage of the cooler 11 is reduced. Can be suppressed. Therefore, the cost of the refrigerator 1 can be reduced by reducing the fins 40a. Further, since the width L1 of the uppermost refrigerant pipe 41 of the cooler 11 is smaller than the width L2 of the lowermost refrigerant pipe 41, the cooler 11 can be downsized to save space in the cooler chamber 12. .

  Further, the defrosting operation of the cooler 11 is performed at a predetermined time. When the defrosting operation is started, the compressor 31 is stopped and the defrosting heater 46 is driven. The cooler 11 and the accumulator 42 are heated by the radiant heat of the defrost heater 46. When the thermistors 45a and 45b reach a predetermined temperature (10 ° C. in this embodiment), the defrost heater 46 stops and the defrost operation is stopped. To do.

  At this time, the thermistor 45 a detects the temperature of the upper part of the cooler 11 away from the defrost heater 46. The thermistor 45b detects the temperature of the accumulator 42 that is cooler than the cooler 11 by storing the low-temperature refrigerant. For this reason, by stopping the defrosting operation by detecting the thermistor 45a and the thermistor 45b, the entire cooler 11 can be reliably heated to the defrosting temperature and defrosted.

  Further, the space between the cooler 11 and the accumulator 42 is shielded by the shielding plate 44. For this reason, when the cool air returns to the cooler chamber 12 from the cool air return ports 9c and 12c, the cool air collides with the cooler 11 while avoiding colliding with the accumulator 42, and heat exchange with the cooler 11 is possible. it can. Thereby, heat exchange efficiency can be improved.

  According to the present embodiment, the cooler chamber 12 in which the cooler 11 is arranged is provided behind the freezer compartment 6 from below the freezer compartment 21 to below the vegetable compartment 5 and extends upward from the cooler chamber 12. The passage 9 avoids the rear of the freezer compartment 6 and passes behind the freezing compartment 21. For this reason, the temperature rise of the cold air flowing through the upper passage 9 is suppressed, and the cooling capacity of the refrigerator 1 can be improved.

  Further, the uppermost fin forming portion 40 of the cooler 11 formed in a plurality of stages is formed in a width in the left-right direction smaller than that of the lowermost fin forming section 40, and is arranged so as to be biased toward the upper passage 9. As a result, the cool air flowing from the lower side to the upper side in the cooler chamber 12 is guided to the upper passage 9 that is biased to one side in the left-right direction, so that the amount of heat exchange is reduced even if the width of the uppermost fin forming portion 40 is reduced. Can be suppressed. Therefore, the cost of the refrigerator 1 can be reduced by reducing the fins 49a.

  Further, since the width L1 of the uppermost refrigerant pipe 41 of the cooler 11 is smaller than the width L2 of the lowermost refrigerant pipe 41, the cooler 11 can be downsized to save space in the cooler chamber 12. The volumetric efficiency of the refrigerator 1 can be improved.

  Further, return ports 12 c and 9 c for returning cool air to the cooler chamber 12 are provided in the lower portion of the cooler chamber 12 opposite to the upper passage 9. For this reason, the whole cool air flowing from the return ports 12c and 9c to the upper passage 9 can be reliably brought into contact with the cooler 11, and the heat exchange efficiency of the refrigerator 1 can be improved.

  Further, since the accumulator 42 is disposed on the side opposite to the upper passage 9 with respect to the cooler 11, it is possible to reduce the pressure loss of the cold air flow as compared with the case where the accumulator 42 is disposed above the cooler 11. In addition, the accumulator 42 can be installed by effectively using the space in the left-right direction of the cooler chamber 12 formed from below the freezing compartment 21 to below the vegetable compartment 5.

  Moreover, since the defrosting operation is stopped when the thermistor 45a and the thermistor 45b reach a predetermined temperature by starting the defrosting operation, the entire cooler 11 can be defrosted with certainty.

  In addition, since the shielding plate 44 that shields the cooler 11 and the accumulator 42 is provided, the cool air can directly exchange heat with the cooler 11 while avoiding the accumulator 42, so that the heat exchange efficiency can be improved.

  Further, since the side wall 9d of the upper passage 9 and the upper wall 12b of the cooler chamber 12 are connected by the inclined surface 12a, when the cool air returns to the cooler chamber 12 through the return port 12c, the right end of the cooler chamber 12 The airflow in the section can be guided to the upper passage 9 without stopping.

Second Embodiment
Next, FIG. 8 has shown the front view of the main-body part 2 of the refrigerator 1 of 2nd Embodiment. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the shape of the upper passage 9 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  The upper passage 9 is provided with divided passages 32a and 32b divided into left and right by a partition wall 32c extending vertically between the blower fan 10 and the damper 23. Discharge ports 9a and 9b are opened in the left divided passage 32b, and the blower fan 10 and the damper 23 are connected by the right divided passage 32a.

  Thus, when the damper 23 is opened, the cool air can be smoothly guided to the refrigeration passage 8 above the damper 23. Further, it is possible to prevent a decrease in the cool air guided to the refrigeration passage 8 due to the cool air discharge from the discharge ports 9a and 9b. Therefore, it is possible to reduce overcooling of the freezing rooms 6 and 26 and the ice making room 25 when the refrigerator compartment 4 and the vegetable compartment 5 are cooled.

  Further, if the upper passage 9 is not provided with the divided passages 32a and 32b, the damper 23 opens when the cooler 11 is clogged and the air volume of the upper passage 9 from the blower fan 10 to the discharge port 9a of the ice making chamber 25 decreases. When the blower fan 24 is driven, a reverse flow that sucks cold air from the discharge port 9a may occur. However, in this embodiment, since the cold air sent from the blower fan 10 is immediately branched by the divided passage 32a and the divided passage 32b, the backflow from the discharge port 9a can be reliably prevented and the cooling efficiency of the refrigerator 1 can be improved. .

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, since the upper channel | path 9 has the division | segmentation channel | paths 32a and 32b, while being able to guide cold to the refrigeration channel | path 8 smoothly, the overcooling of the freezer compartments 6 and 26 and the ice making chamber 25 can be reduced.

  In the present embodiment, the upper passage 9 may be divided in the front-rear direction by the partition wall 32c, and the division passage 32a may be arranged behind the division passage 32b.

<Third Embodiment>
Next, FIG. 9 shows a front view of the main body 2 of the refrigerator 1 of the third embodiment, and FIG. 10 shows a cross-sectional view taken along the line CC in FIG. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in that a blower fan 33 is provided. Other parts are the same as those in the first embodiment.

  The blower fan 33 is provided behind the discharge port 29d. Cold air is discharged into the freezer compartment 6 by driving the cooler 11, the blower fan 10, and the blower fan 33. At this time, even if the discharge port 29 d is separated from the blower fan 10, the cool air is reliably discharged from the discharge port 29 d into the freezer compartment 6 by the blower fan 33. Thereby, cold air is dispersed and discharged from the discharge ports 29a to 29d, and the temperature in the freezer compartment 6 can be made uniform. A plurality of discharge ports 29d may be provided at the right end of the freezer compartment 6.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, the temperature in the freezer compartment 6 can be equalized by providing the blower fan 33. In addition, you may provide the ventilation fan 33 in 2nd Embodiment.

  According to this invention, it can utilize for the refrigerator provided with the cold air | gas channel | path.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Main-body part 3 Heat insulation box 4 Refrigerating room (1st refrigerating room)
4b, 4c, 4d, 4e Shelf 4f Communication port 5 Vegetable room (second refrigeration room)
5a Door 5b Side wall 5c Rear wall 5d Avoidance part 6 Freezer compartment 6a Door 6b, 6c, 6d Storage case 7 Cold air passage 7a, 7b Panel 8 Refrigeration passage 8a, 8b, 8c, 8d, 8e, 8f Discharge port 9 Upper passage 9a 9b Discharge port 9c Return port 9d Side wall 10 Blower fan 11 Cooler 12 Cooler chamber 12a Inclined surface 12b Upper wall 12c Return port 12d Side wall 13 Heat insulating material 14 Outer box 15 Inner box 17 Storage cases 18, 19, 20 Partition 21 Refrigeration compartment 23 Damper 24 Blow fan 25 Ice making room 25a Door 25b Ice storage case 26 Freezing room 26a Door 26b Storage case 27 Partition plate 29 Lower passage 29a, 29b, 29c, 29d Discharge port 30 Machine room 31 Compressor 32a Division passage 32b Division Passage 33 Blower fan (second blower)
34 Return passages 35, 36 Partition 40 Fin forming portion 40a Fin 41 Refrigerant tube 42 Accumulator 43 End plate 44 Shielding plate 44a Shielding chamber 45a Thermistor (first thermistor)
45b Thermistor (second thermistor)
46 Defrost heater 50 Storage case 51 Small case 70 Chilled chamber 70a Storage case 71 Storage case 72 Water storage tank 73 Small chamber

Claims (5)

A first refrigerating room maintained at a refrigerating temperature; a freezing room disposed below the first refrigerating room and maintained at a refrigerating temperature; and between the first refrigerating room and the freezing room, A second refrigerating chamber that is unevenly distributed and maintained at the refrigerating temperature, and is disposed between the first refrigerating chamber and the freezing chamber adjacent to the side of the second refrigerating chamber and maintained at the refrigerating temperature. And a cold air passage having a cooler formed in multiple stages by meandering refrigerant pipes having fin forming portions in which a plurality of fins are juxtaposed, and cool air is passed through the cold air passage. In the refrigerator that discharges to the first refrigerator compartment, the second refrigerator compartment, the freezer compartment and the freezer compartment,
The cool air passage is provided with the cooler, and a cooler chamber provided behind the freezer compartment from below the freezer compartment to a lower portion of the second refrigerator compartment, and avoiding the rear of the second refrigerator compartment, An upper passage extending upward from the cooler chamber through the rear of the freezing compartment,
The refrigerator, wherein the fin forming part at the uppermost stage of the cooler is formed to have a width in the left-right direction smaller than the fin forming part at the lowermost stage, and is biased toward the upper passage side.   The refrigerator according to claim 1, wherein a return port for returning cool air to the cooler chamber is provided in a lower portion of the cooler chamber opposite to the upper passage.   The refrigerator according to claim 1, further comprising an accumulator that accumulates the refrigerant that has flowed out of the cooler, wherein the accumulator is disposed on a side opposite to the upper passage with respect to the cooler. .   A defrosting operation comprising a defrosting heater for defrosting disposed below the cooler, a first thermistor for detecting the temperature of the upper part of the cooler, and a second thermistor for detecting the temperature of the accumulator. The refrigerator according to claim 3, wherein the defrosting operation is stopped when the first thermistor and the second thermistor reach a predetermined temperature.   The refrigerator according to claim 3 or 4, further comprising a shielding plate that shields the cooler and the accumulator.

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